The invention provides a box-type drying device for drying triazole after washing, which comprises a box body, a drying cavity is arranged in the box body, a drying box is arranged in the drying cavity, one side of the drying cavity is connected with heat source equipment through an air inlet I, one side, far away from the air inlet I, of the drying cavity is connected with circulating equipment through an air outlet I, and the circulating equipment is connected with the drying box through an air outlet II. By arranging the circulating equipment, the moisture content of air is reduced, and then the air enters the heating cavity again, so that the air in the drying cavity circulates, the hot air rotation phenomenon is reduced, and the problem that in the drying process of production materials, due to the fact that air flow is concentrated, hot air rotates, and the drying effect is poor is solved. The technical problems that materials are easily heated unevenly, drying is uneven, and particularly blocky and granular materials are uneven in drying degree, particles are not dry enough and are prone to caking and forming, individual formed particles are large, and most formed particles are small are solved.